Cooling system for engines



May 19, 1925.

C. A. DU POY COOLING SYSTEM FOR ENGINES Filed Nov. 15. 1922 2 heets-Sheet 1 mun? Eli-1. amL s 11.2w

c. A. u POY COOLING SY$TEM FOR ENGINES Filed Nov. 15. 1922. 2 Sheets-Sheet 2 gym cantor v Ell-L arLa sA'DuP :1

May 19; 1925.

Patented May 1559,

e er-taro CHARLES A. DU PQY, O'F. OMAR, WASHINGTON. i

COOLING srsrniu non enemas.

Application filed. November 15, 132e, ,Serial no. 601,12

To all who/nit may concern:

Be it known that I, Oneness A, DU For, a citizen of the United States, residing. at Omalz, in the county of Okanagon and State of Washington, have invented certainnew and useful improvements in Cooling Systems for Engines, of which the following internal combustion engines.

An important object of the invention is the provision or" a relatively simple and practical arrangi-zment forthe combined utilization of air and liquid cooling mediums for internal combustion engines.

A further object of the invention is the provision of an improved cooling arrangement, for engines which utilizes air and cooling mediums, and an improved arrangement for. effecting the mixing and circulation ot the mediums.

A further object of the invention is the provision of an improved arrangement of the. above described character, embodying practical advantages over those types of cooling systems utilizing liquid and air mixed cooling mediums, in that the fluid mixing and circulating means embodied in the improved system operates through a combination of air and liquid instead of a solid liquid mass, permitting the driving of the mixing and circulating means with relatiyely little power, and efi'ectively and minutely aerating the liquid mass.

()tlier objects and advantages of this invention will be apparent during the course (it the following detailed description.

in the accompanying drawings, forming a part or' this specificatiomand wherein similar reference characters designate cor; responding parts throughout ,the several views,

Figure 1 is a fragmentary side elevation of an internal combustion engine, showing certain.conventional detailsofa cooling sys tem, and embodying aniinproved arrange ment for aerating a cooling medium such as Figure 2 is a fragmentary and longitudinal cross sectional View, taken through the improved liquid aerating mechanism as embodied in an internal combustion engine cooling sy tem.

Figure 3 is an enlarged transverse cross sectional view, talren substantially on the line 38 of Figure 2.

F'gure t is anenlarged transversecross sectional view, taken substantially on. the line t-t of Flgure 2;

Figure 5 is a, cross sectional view taken substantially on the line 55 of Figure 3.

Figure 6. is a cross sectional view taken substantially on the line 6+6 of Figure 3, Figure 7 is a transverse cross sectional view, taken substantially on the line -77 of Figure 2. i

Ln thedrawings, wherein for the purpose ottillustration is shown. but the preferred embodiment of this invention, the letter A' designates an internal combustion engine of anyapproved type, whlch embodies a novel arrangement B, as used in the conventional of any approved type, preferably of the water cooled block type. c

The cooling arrangement C ordinarily is provided for internal combustion engines of the Water cooled type, and may include the radiator 10, having internal combustion en,-

gine Water manifolds 1:1 communicating upwardly therewith, and the outflow conduit 12 arranged at the bottom of said radiator tor flow of water thnough the improved mechanism 13, whereby water and cold air may intermingle and. passintothe water. pockets of the internal combustion engine A, as coolpockets in the internal combustion engine A, absorbing heat therefrom incident cooperation, said water in itsv heated condition passing through the water manifold 11 into the upper portion of the'radiator 10. The air,

as is well understood, cools the water passing through the radiator 10, so that the cooler portion of the water in the radiator passes downwardly therethrough, and into-the con- 7 I duit 12. The cooling liquid passes through the improved cooling apparatus B in a manner which will be. subsequently described.

Referring to the/construction of the mechanismB for aeration of a cooling liquid, the same includes a novel housing providing a passageway for conducting of the cooling mediums into the internal combustion en-' gine A, and having communication at its ends with the conduit 12 and the water intake opening of the internal combustion engine casing. This housing 20 preferably includes the front portion 21 which maybe of cylindrical formation, and providing a water compartment 22 having direct communlcation with the waterconduit 12 of the cooling means C, as by means of the downprovided with the screw threaded extension 27.

The housing 20 of the improved apparatus B also embodies the front casing portion '30,

which is elongated in formation, and having a front cylindrical shaped end 31 which provides a compartment 33 therein of substantially the same transverse dimension as the compartment 22. This front end 31 is preferably provided, with the annular flange 34 extending outwardly therefrom. Thecasing 30 orrear portion ofthe housing 20 is reduced rearwardly of the compartment 33, providingthe annular shoulder or seat 36 which faces into the compartment 33 provided at the front end of the casing 30; said casing 30 rearwardly of the seat 36 providing a chamber 38, which is somewhat smaller in diameter than the chamber 33. From the chamber 38, the casing. 30 is provide-d with a passageway 39, which leads rearwardly to the rear end of the casing 30, and opening upon said end. The rear end of said casing 30 is provided with the laterally extending flanges 40, being apertured as at 41 for reception of bolts, rivets or other attaching elements 42, whereby the rear end of the housing'20 may be attached to the c vl inder block of an internal combustion engine, so that the passageway 39 may communicate with the water pocket of said internal combustion engine.

coupling sleeve 43 isprovided for coop eration with the sections 21 and 30 of the housing20,which is'interiorly screw threaded, as at 44, for engagement with the screw threads 27 of the section 21, and which ineludes an inwardly extending annular flange 45 for engagement with the outwardly extending annular flange 34 of the section 30,

' and whereby said sections 21 and 30'may be connected in leak proof manner by said coupling 43, as can readily be understood.

A member is preferablyeinployed as v a part of the improved mechanism B, which includes a hollow bearing sleeve 51 adapted for axial extension through the compartment 22 of the housing section 21, and being screw threaded as at 52 upon its frontend, said screw threaded end 52 normally extending through the opening 26 in the front wall 25 of'the casing 21 for adjustably receiving a clamping nut 54 outwardly of the compartment 22. An annular flange or spacing member 56 is preferably formed integral with the hollow tube 51, and adapted for engagement with the inner surface ofthe front wall 25, substantially as isillustrated in Figure 2, whereby when the nut 54 is adjusted on the screw threaded end 52, the

tube 50 will be effectively clamped to the front wall 25, and in leak proof connection therewith.

tion 30, so that the same contact in leak proof connection the flange 28 and seat 36, to provide a chamber 59 intermediate said flanges 57 and 58 which will be hereinafter referred to as the air chamber. When in this position, it can be readily understood that the disc portions 57 and 58. act as walls or barriers dividing the compartment 22 of the section 21 from the smaller compartment The front end of the tube or" bearing sleeve 50 is provided with a pair of 38 of the housing section 30. Both of the I discs or walls 57 and58 are provided with relatively large aligning openings 61, which are adaptedfor receiving tubes 62, the pass sageways 63 of which communicate the chant bers 22 and 38. The front wall or disc 57 is otherwise impervious. 'However, the rear disc or wall 58 is preferably provided with a series of relatively small openings 64 provided transversely therethrough which coinmunicate the air chamber59 with tl'icchamber 38. 1 it can thus be seen that the chainbets or compartments 22 and 38 are in communication through the tube passageways 63, while the air compartment 59 is in communication with the compartments 38 by way of the small openings 64 in the disc or wall 58.

The improved arrangement'B preferably embodies a fluid mixing and impelling mechanism which may include the propel-- ler 66, which is rotatably supported within the compartment 38 upon an end of a shaft 67, which rotatably extends through the bearing sleeve 5:1 and has the forward end thereof extending from said sleeve ;and provided with a pulley member 68 keyed thereto, as 211369. The pulley 68 is provided with the annularly extending flanges 70, which provide a groove intermediate the same for reception .of the fan belt 14 as a driving means for the-propeller 66. A pack ing nut 71 is preferably provided upon ;the forward end of the screw threaded sleeve portion 52, in order to provide a leak proof connection about the propeller shaft 67. The blades 73 of the propeller 66 are of special formation, extending radially from the hub portion 74. The edges of said propeller blades 73, in direct facing relation with the rear wall 58 of the air compartment 59, are preferably hook shaped or overturned as at 7 6 in the direction of rotation of the propeller 66, and which are adapted to receive liquid and air from the chambers and 59, treating the same in the most effective manner for complete aeration of a cooling liquid, and insuring circulation of the same as will be hereinafter noted Means is preferably provided for effectively controlling the supply of air into the housing 20 as a cooling medium, and which includes a tubular shaped tank or casing 81, w iich is preferably vertically positioned, and having the same supported by means of horizontally extending tubes 82 attached to the forward end portion 31 of the housing section 3 These tubes 82 provide passageways 83 therethrough which establish communication between the air chamber 59 and the. chamber 84 of the tank 81. A cap 86 is ireferably screw threaded in the top of the air tube 89, which is preferably provided with the vertical passageway 87 therethrough. A valve member 88 is preferably movably carried by this cap 86 adapted for regulating atmospheric communication of the tube chamber 8%.

In operation, the propeller 66 will be driven within the mixing chamber 38 upon operation of the internal combustion engine A, as can be readily understood by reason of the movement of the fan belt l i over the pulley 68. The rotation of the propeller blades 78 will create a suction, which in addition to the thermo syphonic action of the cooling system will such water or cooling liquid from the liquid chamber through the passageways 63 of the tubes (52 intoihe mixing chamber 38. in similar manner, rotation of the propeller (36 will also draw air into the compartment 59, the valve 88, of course, being open. The

air will pass through the relatively small openings 64 in the wall 58, and it can readily be understood that cool air and liquid will be fed together just behind the propel ler 66. prior to mixing action with the blades 73. Thus the propeller does not have to rotate through a solid :body of liquid, but

rotates through a mixture of air and'liquid.

Theturned edges 7 6 of the propeller blades 7 .73 insure a thorough swashing of the cooling mediums, so that the cooling liquid is the compartment or chamber 38. However,

upon stopping of theengine A, thepropeller 66 will likewise stop and it is probable that water will enter the compartment 59 through the openings 64:, To offset any liability of escape of water or other cooling liquid from the valve passageway 87, a float valve 90 has been provided, which is of elongated formation and disposed within the air tube chamber 84 so that upon rising of the liquid level within this compartment 84, the upper convex arcuate end 91 of the float valve 90 may engage within the arcuate concavity 92 provided in the valve head 86 and effectively seal the air passageway 87 against liability of escape of "cooling liquid. At times it may be desirable to drain all liquid contents from the various compartments of the internal combustion engine cooling system, and to effect a proper draining of the water or liquid from the air compartment 59, notches 95 have been provided in the lower edges of; the walls 57 and 58 which permits draining ofcontents of the. chambers 22, 38 and 59.,

From the foregoing description of this invention it can be seen that a practical unit has been provided, by means of which water or other liquid may be eflectively combined with cool air taken from the atmosphere in providing cooling mediums for the cooling systems of an internal combustion engine. The minute intermingling of the air and liquid mediums, which is necessary to the effective conduction of heat from the cylinders of the internal combustion engine, is effected by the novel arrangement of the propeller 66,.in that its blades rotate entirely through a mixed body of air and liquid to obtain the desired mixing and circulation of the cooling mediums. It is of course understood. that used air escapes by way of the radiator overflow.

Various changes in the shape, size and arrangement of parts may be made to the form of invention herein shown and de scribed, without departing from the spirit of the invention or the scope of the claim.

I claim:

In a cooling system for engines the comrations therein which. communicate the air chamber with the mixing chamber, liquid,

iniet'means for the liquid chamber air inlet means for the air chamber, and churning means in the mixing chamber adapted upon operation to draw air from the air chamber through the perforations in the wall adjacent said mixing chamber and to draw liquid from the liquid chamber through the passageways of the tubes of said member.

CHARLES A. DU roY. 

